S-8253A Datasheet, PDF (12/32 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK

BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK
S-8253A/B Series
Rev.3.7_00
6. Resistance between VMP and VDD, Resistance between VMP and VSS
(Test Condition 6, Test Circuit 2)
Confirm that V1 = V2 = 3.5 V (S-8253A Series), V1 = V2 = V3 = 3.5 V (S-8253B Series), S1 = ON, and S2 = OFF (this
status is referred to as the initial status).
6. 1 Resistance between VMP and VDD (R_VMD)
The resistance between VMP and VDD (R_VMD) is determined based on the current of the VMP pin (I_VMD) after S1 and
S2 are switched to OFF and ON, respectively, starting at the initial status.
S-8253A Series : R_VMD = (V1 + V2) / I_VMD
S-8253B Series : R_VMD = (V1 + V2 + V3) / I_VMD
6. 2 Resistance between VMP and VSS (R_VMS)
The resistance between VMP and VSS (R_VMS) is determined based on the current of the VMP pin (I_VMS) after V1 = V2
= 1.8 V (S-8253A Series) or V1 = V2 = V3 = 1.8 V (S-8253B Series) are set starting at the initial status.
S-8253A Series : R_VMS = (V1 + V2) / I_VMS
S-8253B Series : R_VMS = (V1 + V2 + V3) / I_VMS
7. CTL Pin Input Voltage “H”
(Test Condition 7, Test Circuit 1)
Confirm that V1 = V2 = 3.5 V (S-8253A Series), V1 = V2 = V3 = 3.5 V (S-8253B Series), V4 = 0 V, V5 = 0 V, and the COP
pin and DOP pin are low (this status is referred to as the initial status).
7. 1 CTL Pin Input Voltage “H” (V_CTLH)
The CTL pin input voltage “H” (V_CTLH) is the voltage of V4 when the voltages of the COP pin and DOP pin are high
after the voltage of V4 has been gradually increased starting at the initial status.
8. CTL Pin Input Voltage “L”
(Test condition 7, Test circuit 1)
Confirm that V1 = V2 = 3.5 V (S-8253A Series), V1 = V2 = V3 = 3.5 V (S-8253B Series), V4 = 0 V, V5 = 0.35 V, and the
COP pin and DOP pin are high (this status is referred to as the initial status).
8. 1 CTL Pin Input Voltage “L” (V_CTLL)
The CTL pin input voltage “L” (V_CTLL) is the voltage of V4 when the voltages of the COP pin and DOP pin are low after
the voltage of V4 has been gradually decreased starting at the initial status.
9. CTL Pin Current “H”, CTL Pin Current “L”
(Test Condition 8, Test Circuit 3)
9. 1 CTL Pin Current “H” (I_CTLH), CTL Pin Current “L” (I_CTLL)
The CTL pin current “H” (I_CTLH) is the current that flows through the CTL pin when V1 = V2 = 3.5 V (S-8253A Series),
V1 = V2 = V3 = 3.5 V (S-8253B Series), and S3 = ON, S4 = OFF. The CTL current “L” (I_CTLL) is the current that flows
through the CTL pin when S3 = OFF and S4 = ON after that.
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Seiko Instruments Inc.